Post by Proteja
These are just recommendations, but for my personal VP choices, I went with (First purchase 1st):
The vendor spirit ring/cloak have mastery as a secondary stat, which is less than desirable, so you reforge out crit -> spirit, which gives you around a 70 spirit loss per item, but you gain much more powerful secondary stats.
Now, if you can progress further, and kill Valiona & Conclave, you wouldn't buy those items from vendor and instead get
Planetary Band of the Undertow from Conclave &
Drape of the Twins from Valiona, but the purchase list is based solely on what bosses you have available, and you saying you don't have mana issues.
The stat priority I used was haste > crit > mastery for secondary stats.
Assuming you get the following from the bosses you stated are killable..
Halfus:
Legguards of the Emerald BroodMagmaw:
Breastplate of Avenging FlameODS:
Security Measure Alpha ,
Life Force ChargersMaloriak:
Jar of Ancient Remedies